Hi,

Do you have two public and private keys in some folder, right?

Can you configure a .config file in your ~/.ssh folder to connect multiples hosts in a simple command, example:

In your home directory (/home/my_user) look for a folder named ".ssh".
Haven't? create:

mkdir .ssh

Navigate to the folder:

cd .ssh

Create a config file:

touch .config

Edit him with your preferred text editor:

nano .config

Put the code, something like this:

#HOST1
Host host_prod
        HostName 100.100.100.100
        Port 22
        User ubuntu
        IdentityFile ~/any_folder/private_ssh_file

#HOST2
Host host_test
        Hostname 200.200.200.200
        Port 22
        User ubuntu 
        IdentityFile ~/any_folder/private_ssh_file

Check:

• if your servers are allowed to accept external connections on port 22.
• if the username is the same of this example.
• the correct folder to the private key.

I have found my own solution, I tried to login to second server with password sent to my email and then copy my ssh key via terminal, and now I can log in in to two server at the time without password.